Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 25mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ25 mm
- Stroke25 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20
Tune both travel and end-of-stroke shock precisely with this AirTAC MFCJ25X25-20 adjustable-stroke, variable-cushion mini cylinder. An external adjuster lets you shorten the extend stroke by up to 20 mm on site, while needle air cushions at both ends absorb high-speed impact. It features a JIS-standard round-body build with a SUS304 stainless barrel and riveted aluminium covers, delivering a shorter mounting length than an equivalent ISO 6432 unit.
Delivering 245.3 N push force at 0.5 MPa via a 1/8" port, it handles a safe working load of roughly 147 N. This translates to lifting about 12.5 kg vertically with a 2:1 safety margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG position switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 25 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20 Is Used
Light Assembly Trial Fits
Use the 20 mm extend adjuster to dial in exact contact travel for delicate 12.5 kg component seating, relying on the variable air cushion to prevent harsh impacts during high-speed changeovers.
Package Diverting
Shorten the stroke on-site to match varying carton sizes while the needle cushion absorbs the 245.3 N push force smoothly at the end of travel, keeping the line quiet.
Small Press Dampening
Set the precise extend end-point for light pressing tasks and tune the dual air cushions to decelerate the 25 mm bore safely at speeds up to 800 mm/s without jarring the fixture.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20 the Right Cylinder?
When sizing this series, compare the real thrust outputs: this 25 mm bore gives 245.3 N push at 0.5 MPa, sitting neatly between the MFCJ20 at 157 N and the MFCJ32 at 402.2 N. Choose the 25 mm bore when your changeover requires moderate force alongside on-site stroke tuning and high-speed cushioning for shock-sensitive trial fits.
Mounting options include LB foot, FA flange, and TC trunnion (with no SDB or back-cover available). Because this plain cylinder does not hold position on air loss—the piston drifts—add an external rod lock or pilot check valve for suspended loads. To add sensors, switch to the -S magnet variant.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X25-20 FAQ
This double-acting cylinder uses a 1/8" port and generates 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You must select the -S variant for position sensing. The external adjuster shortens the extend stroke by up to 20 mm, and the variable air cushion only decelerates the piston—it does not lock the load.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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